Chapter 2, Problem 2.39E

(a)

Interpretation Introduction

Interpretation:

Overlap diagrams that show three different ways of combination d-orbitals to form bonds has to be drawn,

Concept Introduction:

Bonds formed due to head-to-head overlap are termed $\sigma$ bonds. Here the shared electrons lie symmetrically along the internuclear axis. They may be formed by various combinations that must occur head on the head such as $s$ and $p_{\text{z}}$ , $p_{\text{z}}$ and $p_{\text{z}}$ or $d_{{\text{z}}^2}$ and $d_{{\text{z}}^2}$. The electron density lies along eth same internuclear axis.

Bonds formed due to sideways or lateral overlap are named $\text{π}$-bonds. They may be formed by the various combinations that must occur laterally such $p_{\text{y}}$ and $p_{\text{y}}$ , $p_{\text{x}}$ and $p_{\text{x}}$ or $d_{\text{yz}}$ and $d_{\text{xz}}$ or $d_{\text{xz}}$ and $d_{\text{yz}}$. The $\text{π}$-electron density lies above and below the internuclear axis in these bonds.

(b)

Interpretation Introduction

Interpretation:

Three types of $\text{d}-\text{d}$ bonds have to be arranged in the order of strongest to weakest.

Concept Introduction:

Refer to part (a).